Joaquin is a man who is in a wheelchair. His house, which has seen better times, is now gloomy and dark. Berta, a stripper and her daughter BETTY call one day at her door responding to an ad that Joaquín put to rent a room. His presence makes the house happy and encourages Joaquin’s life. One night working in his basement, where he repairs computers, Joaquin hears an almost imperceptible noise. He puts his ear against the wall and realizes that a group of thieves, led by Galereto is building a tunnel that passes under his house to steal a nearby bank. Joaquin watches the thieves, takes notes, and manages to know in detail the plan of the robbery. Thus begins to execute a plan contrareloj that will allow him to frustrate the intentions of Galereto and his band.